1989 Oldsmobile Ciera Cooling Fan

JIMMYCHAZ

MEMBER
1989 OLDSMOBILE CIERA
6 CYL
FWD
AUTOMATIC
149,000 MILES

How long do I need to drive before cooling fan should turn on?

Tuesday, October 5th, 2010 AT 6:37 PM

4 Replies

JDL

MECHANIC
16,098 POSTS

The radiator fan should come on if coolant temp exceeds 223 degrees F. It should run if you turn on the ac. Usually if unplug the coolant temp sensor, the fan will run. If you check for mil codes using a jumper at the aldl, the fan will run. Any applicable mil codes?

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Tuesday, October 5th, 2010 AT 8:28 PM

JIMMYCHAZ

MEMBER
3 POSTS

The fan is not coming on after 20 minutes of driving at highway speeds. No mil codes, no check engine light, temp gauge does not work. I'm thinking the fan maybe be toast or there is a short somewhere. Checked fuses and applicable ones seem to be fine.

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Tuesday, October 5th, 2010 AT 9:25 PM

JDL

MECHANIC
16,098 POSTS

You can take the electrical connector loose from the fan, use jumper wires from connector to battery for voltage and ground, to see if the fan will run. Use an inline fuse on the jumper, just in case. The yellow wire is voltage, black is ground. If the fan won't run, suspect the fan motor.

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-1

Wednesday, October 6th, 2010 AT 9:08 AM

JIMMYCHAZ

MEMBER
3 POSTS

It appears that the fan is cycling properly. I just hadn't waited long enough to notice. The car was still overheating so I tried a new radiator cap and that seems to be working. Thanks for your help

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Tuesday, October 12th, 2010 AT 6:48 AM